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Method for utilizing buffer strip to control agricultural non-point source pollution of tidal river network area of plain

A technology of agricultural non-point source pollution and buffer zones, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems that have not been discovered and less research on buffer zone technology, and achieve Improve the ability of soil consolidation and slope protection, good water and soil conservation function, and improve the effect of regional biological species and biomass

Active Publication Date: 2009-10-14
SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Previous studies on buffer zones mostly focused on water catchment areas with complex topography such as hills and mountains. There were few studies on buffer zone technology in plain river network areas, and there were few reports on buffer zone technology in tidal river network areas.
However, after checking the existing technologies, no similar or similar literature reports have been found on the use of artificially constructed buffer zone systems to control agricultural non-point source pollution in tidal river network areas.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First, determine the buffer zone area between the river course and the paddy field, and select the position at an interval of 5 from the river channel as the center line of the buffer zone in the buffer zone area, and determine the width of the buffer zone as 10m according to the regional river channel water environment function zoning;

[0024] Then level the buffer zone area according to the slope and width of 3%, and reinforce the sandy bank with wooden piles;

[0025] Then plant Bermuda, canna, reed and calamus) and water lilies in the ratio of 3:2:2:1 from the rice field to the river;

[0026] Finally, the farmland drainage ditches and other naturally formed drainage channels in the buffer zone are diverted, and the farmland runoff drainage involved in the buffer zone area is introduced into the buffer zone, and then enters the river after being purified by the buffer zone.

[0027] The monitoring results of Example 1 show that the buffer zone has a SS removal rate...

Embodiment 2

[0029] First, determine the buffer zone area between the river course and the paddy field, and select a position 10m away from the river channel in the buffer zone area as the center line of the buffer zone. The pollutant content conforms to the standard value of functional zoning as the target value, combined with the characteristics of regional farmland runoff nitrogen and phosphorus loss, the width of the buffer zone is determined to be 20m;

[0030] Then the buffer zone shall be leveled according to the slope and width of 2%, and the sandy bank shall be reinforced with wooden piles;

[0031] From the paddy field to the river, tall fescue, willow, water onion, hornwort and bitter grass are planted sequentially in a ratio of 3:2:2:1;

[0032] Finally, the farmland drainage ditches and other naturally formed drainage channels in the buffer zone are diverted, and the farmland runoff drainage involved in the buffer zone area is introduced into the buffer zone, and then enters t...

Embodiment 3

[0035] First, determine the buffer zone area between the river course and the paddy field, and select a position 7m away from the river channel in the buffer zone area as the center line of the buffer zone. The pollutant content conforms to the standard value of functional zoning as the target value, combined with the characteristics of regional farmland runoff nitrogen and phosphorus loss, the width of the buffer zone is determined to be 14m;

[0036] Then the buffer zone shall be leveled according to the slope and width of 4%, and the sandy bank shall be reinforced with wooden piles;

[0037] From the paddy field to the river, the planting ratio is 3:2:2:1 and then planting white-flowered clover, water bamboo, centipede, weed and bitter grass;

[0038] Finally, the farmland drainage ditches and other naturally formed drainage channels in the buffer zone are diverted, and the farmland runoff drainage involved in the buffer zone area is introduced into the buffer zone, and the...

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Abstract

The invention relates to a method for utilizing a buffer strip to control agricultural non-point source pollution of a tidal river network area of a plain, belonging to the technical field of environmental protection. The method comprises the following steps of: selecting buffer strip areas, carrying out primary treatment to the buffer strip, setting a water distribution system of the buffer strip, selecting and planting plants in the buffer strip and introducing water source into the buffer strip. The method has the characteristics of simpleness, convenience, practicability, good purifying effect and free maintenance management.

Description

technical field [0001] The invention relates to a method in the technical field of environmental protection, in particular to a method for controlling agricultural non-point source pollution in plain tidal river network areas by using a buffer zone. Background technique [0002] The full name of the buffer zone is the protective buffer zone. It refers to the zone where the plant community near the river, including its composition, plant species and soil moisture, is obviously different from that of the highland vegetation. It is affected by both the water body and the land system, and has obvious edge effects. [0003] Buffer zone is a type of ecotone between terrestrial ecosystem and aquatic ecosystem, and it is one of the components of wetland. It plays an important role in coastal ecosystem and has high ecological, social and economic value. The coastal buffer zone takes vegetation as the main symbol of its existence. Vegetation in the buffer zone not only plays the role ...

Claims

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Application Information

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IPC IPC(8): C02F3/32
CPCY02W10/10
Inventor 黄沈发吴建强唐浩王敏熊丽君
Owner SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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